Southern Arizona Water Users Association

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Lower Santa Cruz River Basin Study


The Southern Arizona Water Users Association (SAWUA) is at the forefront of achieving long-term water security in Southern Arizona. In partnership with area water professionals including: Pima Association of Governments (PAG), Cortaro-Marana Irrigation District, Arizona Department of Water Resources (ADWR), Central Arizona Water Conservation District, and the University of Arizona, SAWUA has embarked on a three year study with the US Bureau of Reclamation. The study aims to understand the balance of water uses and supplies within the Tucson Active Management Area (TAMA) and impacts from climate change, infrastructure needs, and uncertainty about the future.


Lower Santa Cruz River Basin Fact Sheet


Lower Santa Cruz River Basin Study Website


US Bureau of Reclamation July 2015 News Release


Lower Santa Cruz River Basin 2015 Basin Study Abstract Proposal




CAP Allocation Usage


CAP Allocation 2014 Usage Summary




Effluent Generation and Utilization


Reclaimed water is a vital, locally generated, renewable resource. Effluent/reclaimed water is generally used for three purposes:


     - direct reuse

     - environmental enhancement

     - aquifer replenishment


Pima County provides annual summaries of effluent generation and use in the Tucson Active Management Area (TAMA).


Effluent Generation and Utilization Report 2014


Effluent Generation and Utilization Report 2013

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  Studies